Stepper motor spec?

[benergy]

I have MAE stepper motor HY200-2240-290 and cant find any specs
it sais 2.9A per phase 1.6 ohm, how do i find voltage, can i use any voltage within reason as long as amps are adhered to?

[ger21]

Voltage = amps x ohms, or 4.64Volts. For best performance run them at 10-20 times the rated voltage, or 48V -90V. Provided your drives can handle the voltage. And yes, do not exceed the rated current.

[benergy]

thanks gerry
i knew it was something simple...
whats the point in supplying such outrageously higher voltage than motor spec?

[ger21]

Torque drops off rapidly as rpm's increase. Increasing the voltage lets the current flow through the motor faster, maintaining more torque as rpm's increase. Generally, useable speed is proportional to voltage. If you double the voltage, you can roughly double the useable rpm you'll get out of the motor.